[英]Fill nan with repeated values
I have this dataframe which includes nans: 我有这个包含nans的数据框:
Date
0 7.0
1 8.0
2 9.0
3 10.0
4 11.0
5 12.0
6 1.0
7 2.0
8 3.0
9 4.0
10 5.0
11 6.0
...
90 NaN
91 NaN
The Date values are the month number, and I know that on the index 90 it is a 1 but I want to fill the other NaNs with 2, 3 etc until 12 then goes back to 1, 2 and so on. 日期值是月份数,我知道在索引90上它是1,但我想用2,3等填充其他NaN,直到12然后返回到1,2,依此类推。 Lets say it just like in Excel, when you want to fill a column, you put the first values then select them and slide all the way and it fills automatically.
让我们说它就像在Excel中一样,当你想要填充一列时,你把第一个值然后选择它们并一直滑动它自动填充。
Any ideas ? 有任何想法吗 ? Thanks !
谢谢 !
Just do : 做就是了 :
df.Date=(range(len(df))+df.Date.loc[0]-1)%12+1
Then 然后
In [9]: df.loc[[0,90]]
Out[9]:
Date
0 7.0
90 1.0
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